const second = () => {
    console.log('Hello there!');
    console.log(this);
}
  
const first = () => {
    console.log('Hi there!');
    second();
    console.log('The End');
    console.log(this);
}
  
first();

// https://juejin.im/post/5d802025e51d4561f17a518e
export interface ITest1 {
    id: String;
    name: String;
}

export class MyClass1{

    GetStudent() {
        return {id: 'x0001', name: 'zhangsan'}
    }
}

console.log()
 